Abstract：The words “Bielu” in Zheng copied that offered up by Jia in Correct Interpretation of Shangshu
written by Kong Yingda was often considered as a book. Ma Yong thought the author of this book was Jia
Kui, but Wen Si, Cheng Yuanmin and Ma Shiyuan thought was Liu Xiang. “Bielu” is not a book, it means
Zheng Xuan copied the order offered up by Jia Kui.